I think it would be great to add option for more walls and placing them all by yourself, as well other buildings.
Great. But will we ever be able to place buildings or roads on our own? Right now its hard to create more unique districts.
Currently there are 2 types of roads: main roads (running from the city center to the edge of the map) and regular streets within wards. In the future the main roads will be editable, but not the regular streets. The only thing you can do with streets is rerolling them by shift-clicking the ward.